Journal
BIORESOURCE TECHNOLOGY
Volume 238, Issue -, Pages 675-683Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.04.066
Keywords
Cationic dyes; Carboxylic acid; Sesame straw; Thermo-decomposition; Bioadsorbents
Funding
- Natural Science Foundation of China [41401345]
- Natural Science Foundation of Jiangsu Province [BK20140755]
- Jiangsu Agriculture Science and Technology Independent Innovation Funds [CX(12)5054]
- Special Fund for Agro-scientific Research in the Public Interest [20150306]
- Open Foundation of State Key Laboratory of Soil and Sustainable Agriculture [Y412201428]
- JAAS
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This study prepared a carboxylic functionalized bioadsorbent that met the 4-E criteria: Efficient, Economical, Environmentally friendly, and Easily-produced. Sesame straw (Sesamum indicum L.) was functionalized through treatment with citric acid (SSCA) and tartaric acid (SSTA). The products were examined for adsorption capacity and mechanisms. Langmuir model gave the best fit for the isotherm data, and the maximum monolayer adsorption capacity of SSCA was 650 mg g(-1) for methylene blue (MB). The excellent dye adsorption capacity of SSCA can be attributed to the introduction of ester groups during citric-acid modification and the tube-like structures (i.e., sesame straw cell wall remnants). At last, the cost of carboxylic acid functionalized bioadsorbents was evaluated, which showed that SSCA would be the most cost-effective bioadsorbent. Additionally, this study presents a thermo-decomposition methodology for contaminant-loaded bioadsorbent. Results showed that SSCA is probably one of the few bioadsorbents that can be produced and applied in industrial scale. (C) 2017 Elsevier Ltd. All rights reserved.
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